Waist-training, or the “Corset Diet,” is a weight loss trend some women use to winnow down their midsection.

“This is a remarkable way to train your waist to be smaller,” said plastic surgeon Dr. Alexander Sinclair, who claims some of his patients have lost up to six inches.

Kim said she wore a waist trainer to bed every night to make her waist smaller ahead of her May 2014 wedding to Kanye West. The measure sounds drastic, but actress Jessica Alba has credited wearing double corsets around the clock for three months for her dramatic post-baby weight loss.

Similarly, Brooke Burke Charvet, creator of the Transform Your Body workout DVD, said wearing a corset was responsible for her stunning post-baby weight loss after each of her four pregnancies.

“Wrapping your post-partum belly is a concept that has been around for centuries,” said Burke Charvet, who has her own line of belly wraps called Baboosh. “It works as a compression garment. It helps the swelling of the uterus go back down to its original size and it supports all that baggy baby skin. It is a great, great way to get back in shape.”